运行nodejs服务器时为什么会出现此错误？(Why this error coming while running nodejs server?)

运行nodejs服务器时为什么会出现此错误？(Why this error coming while running nodejs server?)

运行nodejs Server时出现此错误

Error: Not Found at C:\wamp\www\scope-leads-node-master\MyApp\app.js:30:13 at Layer.handle [as handle_request] (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\layer.js:95:5) at trim_prefix (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:312:13) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:280:7 at Function.process_params (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:330:12) at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:271:10) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:618:15 at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:256:14) at Function.handle (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:176:3) at router (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:46:12) var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes/index'); var users = require('./routes/users'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;

I am getting this error while running nodejs Server

Error: Not Found at C:\wamp\www\scope-leads-node-master\MyApp\app.js:30:13 at Layer.handle [as handle_request] (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\layer.js:95:5) at trim_prefix (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:312:13) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:280:7 at Function.process_params (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:330:12) at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:271:10) at C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:618:15 at next (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:256:14) at Function.handle (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:176:3) at router (C:\wamp\www\scope-leads-node-master\MyApp\node_modules\express\lib\router\index.js:46:12) var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes/index'); var users = require('./routes/users'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;

最满意答案

嗯，这是你在你写的中间件中传递的错误（第30行）：

app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); });

此代码只是在每个HTTP请求上传递错误，您应该将其注释掉。

Finally, It's working. I am still seeing that "not found" error in http://localhost:3000. But everything is working fine. I have used another computer to do this. Just did the following.

npm install express npm install npm start

nodejs, git server should haven been installed in our machine.